A: Here we are on the subway. M: Yes, we are travelling in rush hours. It could be very crowded in the ___________ and after 6 o’clock in the afternoon. A: I heard that many people ____________. M: Yes, many families have their own cars. A: Why don’t they drive? Isn’t a car more convenient than the subway? M: Well, it is _______ to find a parking place in the city. Besides, parking is expensive in the downtown . A: I see. I saw many public bicycles ___________ the subway station. I think we can go back home by bike ____________. M: OK. Bike riding will help us do some exercise. And we won’t have to worry about traffic jam after getting off work.